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Developing 1D magnetocaloric inter-metallic nanostructures for environmentally friendly magnetic refrigerant cooling systems

Grant number: 18/19096-1
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2019
Effective date (End): February 28, 2021
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Fanny Béron
Grantee:Prabhakaran Thandapani
Home Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:17/10581-1 - Emergent phenomena in reduced dimension systems, AP.TEM


Recently the research interest in finding a suitable alternative to the existing conventional technology and reducing the consumption of fossil fuel increases. Conventional vapor compression cooling system uses of CFC and HCFC refrigerants have introduced serious impacts on the environment. The magnetic refrigeration (MR) is a promising alternative to the conventional cooling systems and has attracted a large number of researchers due to its high energy efficiency and environmentally friendly approach. The nanostructured materials are special for MR as they have a higher magnetocaloric effect over a distribution of temperature and better cooling efficiency compared to the bulk. One-dimensional nanowires are attracting great interest due to their multifunctional properties. The dimensionality effect makes them potential candidate in various functional devices such as optical, biomedical, and electrical devices. Based on previous experiences of fellow candidate and sponsoring researcher, the ideas of dimensionality are extended for achieving highly efficient magnetic refrigerants. The present project is proposed to focus on the dimensionality effects on the bulk intermetallic single crystals for green MR applications.The methodology involved in this project is divided as follows: 1. Fabricate the MnAs1-xPx (0.01 d x d 0.1) and Mn1-xCuxCoGe (0.01 d x d 0.1) intermetallic bulk and nanowire crystals using metallic-flux nanonucleation technique. 2. Investigate the fundamental properties such as crystalline structure, morphology, elemental composition, magnetic properties at different temperature and magnetic fields, specific heat capacity and electrical resistivity measurements and 3. Compare the properties of the materials and propose the best magnetic refrigerant for the cooling applications.